Which Technique Relies on the Psychological Principle That People Are

Multiple Choice

Which technique relies on the psychological principle that people are more likely to respond positively to a request from another person if they have previously responded positively to another,typically smaller,request?

A) Even-a-penny-will-help
B) Ingratiation
C) Door-in-the-face
D) Personalization
E) Foot-in-the-door